potassium alum


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Noun1.potassium alum - a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
Al, aluminium, aluminum, atomic number 13 - a silvery ductile metallic element found primarily in bauxite
double salt - a solution of two simple salts that forms a single substance on crystallization
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References in periodicals archive ?
Barangay chair Edison Diaz, 41, claimed that the two large packages found hidden inside a cupboard in his room contained 'tawas (potassium alum).'
Potassium alum, or potash, a mineral found in the mountains around Oaxaca, is used as a mordant, holding the dye to the yarn.
In sequence, the roes were immersed for 15-30 min, until the roe stay firm in a solution of 5% (5.0 g [L.sup.-1]) of potassium alum (KAl [[S[O.sub.4]].sub.2]) produced with water in saline (10.0 g NaCl [L.sup.-1]).
Because of the relative abundance of NOM to NPs in our experiments, hydrolytic aluminum species formed from potassium alum will preferentially react with the free NOM (Hyung and Kim 2009; O'Melia et al.
There has also been a problem with fake eggs, which were made in laboratories from alginic acid, potassium alum, gelatin and calcium chloride.
Principal minerals of rock crusts in the studied region are gypsum (CaS[O.sub.4]-2[H.sub.2]O) and locally developed goethite ([alpha]FeOOH), but various water-soluble salts were also encountered in subflorescences: potassium alum [[KAl(S[O.sub.4]).sub.2]x12[H.sub.2]O], tschermigite [N[H.sub.4]Al(S[O.sub.4] )2"12[H.sub.2]O] and brushite (CaHP[O.sub.4]x2[H.sub.2]O).

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